Senior Software Engineer - Front End/Back End (Library of Congress)

Ad Hoc LLC; Washington (District of Columbia); Hybrid; USD 115,000 - 135,000; Full time

Benefits offered by this job

Health insurance

Dental insurance

Vision insurance

Flexible PTO

401K with employer match

Parental leave

Job summary

Ad Hoc LLC is seeking a Senior Software Engineer with full-stack capabilities to work on front-end and back-end systems for Federal Civilian projects, including the Library of Congress. This remote role emphasizes collaboration across teams, design, and delivering scalable software solutions.

You will design, implement, and mentor, contributing to high-quality production code while engaging with clients and stakeholders.

Qualifications

• Bachelor’s degree and 7+ years of professional software engineering experience.
• Demonstrated expert-level knowledge in at least one technical discipline, including front-end, back-end, full-stack, or infrastructure engineering.
• Experience designing, developing, testing, and maintaining production software applications.
• Experience troubleshooting complex technical issues and contributing to scalable, maintainable software solutions.
• Demonstrated ability to communicate technical concepts effectively to both technical and non-technical audiences.
• Experience providing technical guidance, mentorship, or peer support to other engineers.
• Must meet any applicable contractual or labor category requirements related to education and professional experience.

Responsibilities

• Demonstrate technical expertise, accountability, and ownership of contributions to the application codebase.
• Maintain a strong understanding of adjacent technical areas, systems, and ecosystems to effectively coordinate integrations and dependencies.
• Design, develop, test, maintain, and improve high-quality software solutions across front-end and/or back-end systems.
• Diagnose and resolve complex technical issues within owned systems, using incidents and lessons learned to identify opportunities for system and process improvements.
• Mentor and support junior and mid-level engineers in developing their technical and problem-solving skills.
• Clearly communicate technical concepts, issues, risks, and developments to team members, clients, and stakeholders.
• Participate in technical interviews and help evaluate engineering candidates.
• Use strong technical judgment and influencing skills to propose, evaluate, and recommend approaches to technical and process challenges.
• Provide technical guidance and mentorship to engineers within the team.
• Lead small projects, technical initiatives, or temporary team structures as needed.
• Develop and present design documents, system diagrams, technical recommendations, and other engineering artifacts to clients, stakeholders, partners, and fellow engineers.

Skills

Full-stack engineering

Front-end

Back-end

APIs

CI/CD

Agile

Mentorship

Education

Bachelor’s degree

Tools

Java

Python

Node.js

Job description

Are you ready for new challenges and new opportunities?

Join our team!

Current job opportunities are posted here as they become available.

Senior Software Engineer - Front End/Back End (Library of Congress)

Senior Software Engineer - Front End/Back End

Job Number: 973
This is a remote position.

Ad Hoc is a technology company that empowers organizations to deliver scalable, impactful digital services. Using modern, agile methods, our team creates products that meet people’s needs and transform their experience of government.

Work on things that matter

Our collaborations have shaped some of the defining moments in public-sector service delivery. We’ve helped build products that connect Veterans to tailored services, help millions access affordable health care, and support important programs like Head Start. As we work with agencies to deliver critical services, we’re also changing how the government approaches technology.

Built for a remote life

Our culture, communications, and tools are built for remote work, enabling us to bring together top talent nationwide. At Ad Hoc, remote life empowers our teams to design work environments that fit their lives and that foster flexibility and collaboration to achieve positive outcomes for our customers.

Committed to high expectations and a welcoming culture

Ad Hoc values acceptance, accountability, and humility. We aren’t heroes. We learn from our mistakes and improve the process for the next time. We build small, inclusive teams to collaborate closely with our partners to solve the right problems and deliver software that works.

The Federal Civilian business unit supports many customers spanning the federal, commercial, and nonprofit space. Our customers include NASA, the General Services Administration, Office of Personnel Management, the Library of Congress, Health & Human Services, and the FDIC. We partner with these agencies to build new capabilities, deliver products, establish data as a strategic asset for informed decision-making, modernize legacy systems, and build the digital service infrastructure necessary to scale their mission impact.

Primary Responsibilities:

• Demonstrate technical expertise, accountability, and ownership of contributions to the application codebase.
• Maintain a strong understanding of adjacent technical areas, systems, and ecosystems to effectively coordinate integrations and dependencies.
• Design, develop, test, maintain, and improve high-quality software solutions across front-end and/or back-end systems.
• Diagnose and resolve complex technical issues within owned systems, using incidents and lessons learned to identify opportunities for system and process improvements.
• Mentor and support junior and mid-level engineers in developing their technical and problem-solving skills.
• Clearly communicate technical concepts, issues, risks, and developments to team members, clients, and stakeholders.
• Participate in technical interviews and help evaluate engineering candidates.
• Use strong technical judgment and influencing skills to propose, evaluate, and recommend approaches to technical and process challenges.
• Provide technical guidance and mentorship to engineers within the team.
• Lead small projects, technical initiatives, or temporary team structures as needed.
• Develop and present design documents, system diagrams, technical recommendations, and other engineering artifacts to clients, stakeholders, partners, and fellow engineers.

Basic Qualifications:

• Bachelor’s degree and 7+ years of professional software engineering experience.
• Relevant professional experience may be substituted for education where permitted.
• Demonstrated expert-level knowledge in at least one technical discipline, including front-end, back-end, full-stack, or infrastructure engineering.
• Experience designing, developing, testing, and maintaining production software applications.
• Experience troubleshooting complex technical issues and contributing to scalable, maintainable software solutions.
• Demonstrated ability to communicate technical concepts effectively to both technical and non-technical audiences.
• Experience providing technical guidance, mentorship, or peer support to other engineers.
• Must meet any applicable contractual or labor category requirements related to education and professional experience.

Preferred Qualifications:

• Experience working across both front-end and back-end technologies in a full-stack environment.
• Experience designing, building, and maintaining modern web applications and APIs.
• Experience with back-end technologies such as Java, Python, Node.js, or similar languages and frameworks.
• Experience working with relational and/or NoSQL databases.
• Familiarity with cloud platforms such as AWS, Azure, or Google Cloud.
• Experience with CI/CD pipelines, automated testing, and modern software development practices.
• Experience working in Agile or iterative development environments.
• Experience mentoring engineers or providing technical guidance within a development team.
• Experience collaborating directly with clients, product teams, designers, and other technical stakeholders.
• Experience supporting government or federal programs.
• Familiarity with accessibility, security, performance, and scalable application design practices.
• Company-subsidized health, dental, and vision insurance
• Flexible PTO
• 401K with employer match
• Paid parental leave after one year of service
• Employee Assistance Program

Ad Hoc LLC is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, national origin, ancestry, sex, sexual orientation, gender identity or expression, religion, age, pregnancy, disability, work-related injury, covered veteran status, political ideology, marital status, or any other factor that the law protects from employment discrimination.

We value the unique skills gained through military service and encourage veterans and transitioning service members to apply.

In support of various state and city equal pay transparency laws, Ad Hoc job descriptions feature the starting range we reasonably expect to pay to candidates who would join our team with little to no need for training on the responsibilities we've outlined above. Actual compensation is influenced by a wide range of factors including but not limited to skill set, level of experience, and responsibility. The range of starting pay for this role is $115,000-$135,000. Our recruiters will be happy to answer any questions you may have, and we look forward to learning more about your salary requirements.